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This reverse lockout safety feature means you won't be accidentally over-shifting into reverse while making a pass at the strip
Gram Weight: 426
Replaces GM # 12558178
Chamber Chamber: 66cc
BIG BLOCK CHEV 396-454 HEAD BOLT KIT, 12-POINT HEAD, 8740 GRADE MATERIAL Category_BELT TENSIONERS This reverse lockout safety featureBig Block Chev 396 454 Head Bolt Kit 12 Point Head, Suit Aeroflow 320cc and Edelbrock Performer RPM Cylinder Heads, 8740 Grade Material Aeroflow Performance head bolts greatly improve your cylinder head to block sealing compatibilities. This is important in engines with high power adders such as turbochargers, superchargers or nitrous. They can even be a great addition to a mildly modified build as insurance against failure. These head bolts are